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# DAT policy evaluations =======================================================
# Controls: DAT-001 through DAT-009
package controls.aws.dat
import data.common.exemptions as exemptions
import data.common.outputs as outputs
# DAT-001 — RDS DB Instances Must Not Be Publicly Accessible ------------------
deny contains msg if {
some policy_id in {"ICP-TF-AWS-DAT-001", "ICP-TF-AWS-GAC-010"}
some _, rc in input.resource_changes
rc.type in {"aws_db_instance", "aws_rds_cluster_instance"}
rc.change.actions[_] in ["create", "update"]
rc.change.after.publicly_accessible == true
meta := data.policies[policy_id]
meta.status == "active"
not exemptions.policy_exemption(policy_id)
not exemptions.severity_exemption(meta.severity)
msg := outputs.violation(
policy_id, meta,
sprintf("'%s.%s' is publicly accessible", [rc.type, rc.name]),
)
}
# DAT-002 — Enable RDS Storage Encryption At Rest -----------------------------
deny contains msg if {
some policy_id in {"ICP-TF-AWS-DAT-002", "ICP-TF-AWS-GAC-009"}
some _, rc in input.resource_changes
rc.type in {"aws_db_instance", "aws_rds_cluster"}
rc.change.actions[_] in ["create", "update"]
rc.change.after.storage_encrypted != true
meta := data.policies[policy_id]
meta.status == "active"
not exemptions.policy_exemption(policy_id)
not exemptions.severity_exemption(meta.severity)
msg := outputs.violation(
policy_id, meta,
sprintf("'%s.%s' does not have storage encryption enabled", [rc.type, rc.name]),
)
}
# DAT-003 — Publish RDS Engine Logs to CloudWatch -----------------------------
deny contains msg if {
policy_id := "ICP-TF-AWS-DAT-003"
some _, rc in input.resource_changes
rc.type in {"aws_db_instance", "aws_rds_cluster"}
rc.change.actions[_] in ["create", "update"]
not _has_log_exports(rc.change.after)
meta := data.policies[policy_id]
meta.status == "active"
not exemptions.policy_exemption(policy_id)
not exemptions.severity_exemption(meta.severity)
msg := outputs.violation(
policy_id, meta,
sprintf("'%s.%s' has no CloudWatch log exports configured", [rc.type, rc.name]),
)
}
_has_log_exports(after) if {
count(after.enabled_cloudwatch_logs_exports) > 0
}
# DAT-004 — Enable RDS Deletion Protection ------------------------------------
deny contains msg if {
some policy_id in {"ICP-TF-AWS-DAT-004", "ICP-TF-AWS-GAC-011"}
some _, rc in input.resource_changes
rc.type in {"aws_db_instance", "aws_rds_cluster"}
rc.change.actions[_] in ["create", "update"]
rc.change.after.deletion_protection != true
meta := data.policies[policy_id]
meta.status == "active"
not exemptions.policy_exemption(policy_id)
not exemptions.severity_exemption(meta.severity)
msg := outputs.violation(
policy_id, meta,
sprintf("'%s.%s' does not have deletion protection enabled", [rc.type, rc.name]),
)
}
# DAT-005 — Enable RDS Automatic Minor Version Upgrades -----------------------
deny contains msg if {
policy_id := "ICP-TF-AWS-DAT-005"
some _, rc in input.resource_changes
rc.type == "aws_db_instance"
rc.change.actions[_] in ["create", "update"]
rc.change.after.auto_minor_version_upgrade != true
meta := data.policies[policy_id]
meta.status == "active"
not exemptions.policy_exemption(policy_id)
not exemptions.severity_exemption(meta.severity)
msg := outputs.violation(
policy_id, meta,
sprintf("RDS instance '%s' does not have auto minor version upgrade enabled", [rc.name]),
)
}
# DAT-006 — Enable DynamoDB Point-in-Time Recovery ----------------------------
deny contains msg if {
some policy_id in {"ICP-TF-AWS-DAT-006", "ICP-TF-AWS-GAC-024"}
some _, rc in input.resource_changes
rc.type == "aws_dynamodb_table"
rc.change.actions[_] in ["create", "update"]
not _pitr_enabled(rc.change.after)
meta := data.policies[policy_id]
meta.status == "active"
not exemptions.policy_exemption(policy_id)
not exemptions.severity_exemption(meta.severity)
msg := outputs.violation(
policy_id, meta,
sprintf("DynamoDB table '%s' does not have point-in-time recovery enabled", [rc.name]),
)
}
_pitr_enabled(after) if {
some pitr in after.point_in_time_recovery
pitr.enabled == true
}
# DAT-007 — Redshift Clusters Must Not Be Publicly Accessible -----------------
deny contains msg if {
policy_id := "ICP-TF-AWS-DAT-007"
some _, rc in input.resource_changes
rc.type == "aws_redshift_cluster"
rc.change.actions[_] in ["create", "update"]
rc.change.after.publicly_accessible == true
meta := data.policies[policy_id]
meta.status == "active"
not exemptions.policy_exemption(policy_id)
not exemptions.severity_exemption(meta.severity)
msg := outputs.violation(
policy_id, meta,
sprintf("Redshift cluster '%s' is publicly accessible", [rc.name]),
)
}
# DAT-008 — Enable Redshift Audit Logging -------------------------------------
deny contains msg if {
policy_id := "ICP-TF-AWS-DAT-008"
some _, rc in input.resource_changes
rc.type == "aws_redshift_cluster"
rc.change.actions[_] in ["create", "update"]
not _redshift_logging_enabled(rc)
meta := data.policies[policy_id]
meta.status == "active"
not exemptions.policy_exemption(policy_id)
not exemptions.severity_exemption(meta.severity)
msg := outputs.violation(
policy_id, meta,
sprintf("Redshift cluster '%s' does not have audit logging enabled", [rc.name]),
)
}
_redshift_logging_enabled(rc) if {
some _, other in input.resource_changes
other.type == "aws_redshift_logging"
other.change.actions[_] in ["create", "update"]
other.change.after.cluster_identifier == rc.change.after.cluster_identifier
}
# DAT-009 — Enforce ElastiCache Redis Encryption in Transit and At Rest -------
deny contains msg if {
policy_id := "ICP-TF-AWS-DAT-009"
some _, rc in input.resource_changes
rc.type == "aws_elasticache_replication_group"
rc.change.actions[_] in ["create", "update"]
not _elasticache_encrypted(rc.change.after)
meta := data.policies[policy_id]
meta.status == "active"
not exemptions.policy_exemption(policy_id)
not exemptions.severity_exemption(meta.severity)
msg := outputs.violation(
policy_id, meta,
sprintf("ElastiCache replication group '%s' does not enforce encryption in transit and at rest", [rc.name]),
)
}
_elasticache_encrypted(after) if {
after.transit_encryption_enabled == true
_truthy(after.at_rest_encryption_enabled)
}
_truthy(v) if v == true
_truthy(v) if v == "true"
|
